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Troubleshooting Your System 79
Troubleshooting Your System
Safety First—For You and Your System
To perform certain procedures in this document, you must remove the system cover and work inside the
system. While working inside the system, do not attempt to service the system except as explained in
this guide and elsewhere in your system documentation.
CAUTION: Only trained service technicians are authorized to remove the system cover and access any of
the components inside the system. Before performing any procedure, see your Product Information Guide for
complete information about safety precautions, working inside the computer and protecting against
electrostatic discharge.
Start-Up Routine
Look and listen during the system's start-up routine for the indications described in Table 4-1.
Table 4-1. Start-Up Routine Indications
Look/listen for: Action
An error message displayed on the
monitor.
See "System Messages" on page 15.
System status and diagnostic indicators See "Front-Panel Features and Indicators" on page 11 and
"Diagnostics Indicator Codes" on page 22.
Alert messages from the systems
management software.
See the systems management software documentation.
The monitor's power indicator. See "Troubleshooting the Video Subsystem" on page 81.
The keyboard indicators. See "Troubleshooting the Keyboard" on page 81.
The USB diskette drive activity indicator. See "Troubleshooting a USB Device" on page 83.
The USB CD drive activity indicator. See "Troubleshooting a USB Device" on page 83.
The optical drive activity indicator. See "Troubleshooting an Optical Drive" on page 89.
The hard-drive activity indicator. See "Troubleshooting a Hard Drive" on page 90.
An unfamiliar constant scraping or
grinding sound when you access a drive.
See
"Getting Help
" on page 103
.